My big BO roo turned mean, I couldn't deal with him at all, so off with his head. I have an EE roo now who got a little feisty, I'm not afraid of him, though, so I caught him and carried him around the house a few times - first time back to the coop he started carrying on, struggling in my arms, so I told him nope, not yet....second time around the house we went back to the coop and he hung his head in defeat. That was over a month ago, and I haven't had any trouble with him since. No, I didn't hang him upside down, I think that can really hurt them, if not kill them. You do have to teach him who is boss, though. As others have noted, that'll just teach him you are boss - it won't help your four year old with him, unfortunately.